Sorry, I don't mean to butt in.

对不起，我不是故意要插一杠子。

《柯林斯英汉双解大词典》

I didn't ask you to butt in on my private business.

我没请你干预我的私事。

《牛津词典》

He was going to butt in when his mother darted a look of disapproval at him.

他刚要插嘴，妈妈瞥了他一眼。

《新英汉大辞典》

His grandmother is washing him and his brother in the tub, and she's washing his butt, and he says to her, "When you're finished, kiss back there."

他祖母帮他擦屁股时，他兄弟也在浴缸里，他对祖母说，：,“洗完澡你要亲我的屁股，“

耶鲁公开课 - 1945年后的美国小说课程节选

Below are the 10 things to avoid if you want to kick butt in business.

FORBES: 10 Business Mistakes Every Entrepreneur Can Avoid

It was presumably left to Jesus himself to tell Peter to butt off in John 21:21 and 22.

FORBES: As Supreme Court Weighs DOMA, More Employers Provide Same Sex Benefits

Smith jawed at Indiana's Lance Stephenson for almost 10 seconds, before Stephenson tried to head butt him in response.

WSJ: N.Y. Knicks: The All-Star Break Is Over, Right?